In OS X Lion and Lion Server v10.7 through v10.7.2, if a file on a locally mounted Xsan volume has been edited by multiple users on different systems, you may see the following alert message when trying to save the file: "The operation couldn’t be completed. (GSLibraryErrorDomain error 1.)"

When using Xsan Admin on a Mac that has been configured to use an HTTPS proxy, you may encounter unexpected authentication issues when connecting to Xsan systems. The following alert may appear: "Authentication failures occurred. Not all clients were successfully authenticated."

Howdy,
We have just set up XSAN (version 3/Mavericks) with 7 users.
All the users have joined the "Workgroup" by default and all work perfectly well.
We have an 8th client who we can mount as a computer in the XSAN share list, but we cannot add to "Workgroup". Both XSAN Admin (3.1) and Server (3.2.2) advise that user already exists, which is not the case.
We've attempted to remove the computer and add again with no luck.
Any pointers will result in beer.
Simon.